Diamonding-tool for grinding-machines.



H. T. SHEARER. ommounme TOOL FOR GRINDING MACHINES.

, APPLICATION FILED AUGAI. 191-2. 1,200,768. "Patented 001;.10,1916.

- 2 SHEETS-SHEET l H. T. SHEARER. DIAMONDING TOOL FOR GRlNDlNG MACHINES.

APPLICATION FILED AUG.17, t9l2. 1,200,768. Patented Oct. 10,1916. 2 SHEETS-SHEET 2.

;f i a nanny a.

. certain new and Diamondmg-Tools grinding wheels, adapted for dressing c H derstood, of course, tool may be mounted j naooyies.

' such a curve may be SHEARER, OF WAYNESBORO, PENNSYLVANIA, ASSIGNOR I'O COMPANY, OF WAYNESBORO, PENNSYLVANIA, A CORPORATION.

DIAMONDING-TOOL FOR GRIN DIN G-MACHIN' ES.

To all whom it may concern Be it known that I, HARRY T. SHEARER, a.

citizen of the United States, residing at Franklin county, and State of Waynesboro, Pennsylvania, have invented and discovered l useful Improvements in r for Grinding-Machines, of which the following is a specification.

' My said invention consists in various improvements in .the details of construction and arrangement of parts of diamonding tools for use. in dressing the surfaces of relating especially to tools not only the faces, but the corners of said grinding wheels Where it is desired to have such corners of a curved or convex character, whereby the radius of accurately determined as desired, all as will be hereinafter more fully described andclaimed.

Referring to'the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts, Figure l-is a side elevation of a tool embodying my said invention, Fig. 2 a detail view of a portion thereof on an enlarged scale, Fig. 3 a detail face elevation of the part shown in Fig. 2, Fig. 4 a detail section on the line pf the diamond holder, Fig. 5 a cross section on the dotted line 55 in Fig. 2, and 'Fig. 6 a detail diagrammatic view.

' In said drawings the portions marked A represent a work support, or base, on which said diamonding tool is mounted, B the frame ofsaid diamonding tool, 0 the support of said diamonding tool, and D the diamond point.

The work rest A is shown merely to illustrate the support on which the diamonding tool is commonly used and requires no special description, inasmuch as it forms the subject matter of another application filed April 5, 1912, Serial Number 688,652.

The frame B. form to support the diamonding tool mechanism and is preferably mounted on the top ofthe frame A and secured thereon by inter-engaging parts and clamping bolts b, or in any appropriate manner. It will be unthat said diamonding directly upon the work grinding machine if precarriage of the provided with a frame suitable ferred and for such mounting.

Specification o'f Iietters Patent.

.21 is mounted thereon to secure it is a casting of appropriate The support cially to carry formed with a TED STATES PATENT QFFEGE.

LANDIS TOOL Patented Oct. 10, 1%16. Application filed August 17,1912. if Serial No. 715,671.

C is a casting designed espethe diamond holder and is journal a on its upper end which is-mounted in a bearing Z) on the up per end of frame B. A lever 10 is secured to the upper end of said journal by which said support may be swung on said journal. .Stop screws 11 are mounted in the face of the upper end of bearing 12 to limit the movement of said lever 10 to swing the diamonding of a length tool through the arc of a circle required by the work. An antifriction roller 12 is carried by a screw13 on the lower end of said support C adapted to bear against the innerface of a track 14 formed on the arc of a circle on the lower end of frame B thus affording a support for said lower end while to carry the tool in support C is formed 0 with parallel projecting arms 15 permitting it to swing the are desired. 'Said with a transverse slot on each side thereof through which a set screw 16 extends for the support to force roller l2-solidly track 14 and make support 0 rigid be readily understood.

purpose of springing said against as will The diamond D is mounted in a holder cl which is secured by a set screw socket'in the inner which is connected by nection with the front end of a s 17 ina end of a screw rod 18 a screw-threaded conleeve 19 mounted in a transverse perforation near the lower end of said support C. A wheel 20 is mounted knurled on the outer end of said screw 18 by which it may be turned for adust nent in said sleeve 19, and a justed position. Said sleeve 19 is jam nut in the adsecured against longitudinal movement by a set screw 22 inserted of support C and in the periphery of said-sleeve.

in a perforation in the side engaging with a groove 9 The perforation in said sleeve'iltl in which said screw 18 is mounted 1s formed eccentric thereto as shown in- Fig. 5. sleeve the diamond D may be readily to the exact center so that by turning said brought in line with the axis of the journal 1 of said support C so as to turn on a true are the corners of the grinding wheels.

Thus far the tool of a circle in r ounding described is of a type hitherto in use in connection with the grinding machine and is shown and described to give a clear understanding of my improvement, which constit utes my present invention, and which will now be described.

Alongside screw 18 and parallel therewith is formed another perforation in a wing 23 on support G in which is mounted a sliding rod 24 which is adapted to be secured in any position by means of a set screw 25 adapted to impinge against its side. On its forward end 18 mounted an arm 26 extending at right therewith. The outer face of wing 23 is preferably flattened along the side of said slot 8 in order that the scale along the edges of said slot may have a sharp edge to better register with said indicator mark as. I have utilized both edges in order to have boththe English and metric systems provided for use as may be preferred in the locality where the machine is being used. Said scale is designed to determine any radius which will be described by the inner face of its arm 26 on the turning of support C on its journal by lever 10. By this means the corners of the grinding wheel W may be ground of the exact radius desired as follows: The curve desired for the corners being determined, said arm 26 is set across the path of diamond D as indicated 'by dotted lines in Fig. 3, at the position where the scale will indicate the radius of said curve. The rod 24. is then locked in this position by means of the set screw 25 and the screw rod 18 adjusted to bring the diamond D against the inner face of said arm 26 in which positionit is locked by the jam nut 21. Said screw 25 is then loosened and arm 26 allowed-to fall to the position shown by whole lines in' Fig. 3 which is its normal position, and rod 24: may be slid back to bring the parts out of the way of the work.

In operation the grinding wheel is set to move across the path of the diamonding tool or the diamonding tool may be carried on a part set to move across the face of said grinding wheel. The grinding wheel being in rapid rotation the face is dressed off squarely and truly by the tool manipulated by the handlelO which is set in position to support the tool to carry it parallel with the axis of said grinding wheel. When the corners ofthe grinding wheel are to be rounded, as indicated in Fig. 6, the tool will be turned by the handle 10 as it reaches said corners and, the radius having been. determined and fixed, said diamond will pass over said corners on the exact are or curvature desired. The operation continues back and forth until the face is dressed truly, in-

eluding the corners, when the tool is re-' moved or adjusted out of position by being slid rearwardly on the supporting ways at the upper end of frame A.

Havingthus fully described my said invention what I claim as new and desire to secure by Letters Patent is:

1. In a diamonding tool for'grinding machines, the combination of a frame, a pivoted support carried by said frame, an adjustable diamond holder mounted in said pivoted support, and a radius finder mounted alongside said diamond holder comprising a sliding rod mounted parallel with said diamond holder and carrying a right angular arm adapted to. swing across the path of the diamond point, a scale being provided on one part and an indicator on f the other for determining the radius, and means for securing said rod in the desired position, substantially as set forth.

2. In a diamonding tool for grinding machines the combination of a frame, a pivoted support for the diamond holder carried by said frame, means for swinging said support in said frame, a diamond holder carried in a socket in said support, means for adjusting andsecuring said holder, and a radius finder mounted on said support alongside said diamond holder comprising a sliding part with an arm adapted to swing across the diamond point or'ou't of the way thereof, a scale being formed on one part and an indicator on the other for determining said radius, substantially asset forth.

3. A radius finder for diamonding tools for grinding machines comprising a swinging support, a diamonding tool carried by said swinging support, and a sliding part.

HARRY T. SHEARER. [L.s.]

Witnesses:

WILLIAM T. HAMMOND, K. H. WASHABAUG'H. 

